Unbound Tech Ltd.

Bar-ilan University

Coinbase Il Rd Ltd.

Guy Pe'er

Yehuda Lindell

Valery Osheter

Oz Mishli

Nir Steinherz

George Wainblat

Michael Kraitsberg

Michael Vakulenko

Alexander Presman

Yaniv Refael

Alex Presman

Saar Pe'er

Elena Gorelikov

Saar Peer

Danny Tabak

A method for recovering data from a database, the method performed by a device having a processor, the method including encrypting information stored in the database using an encrypting cryptographic key, sending encrypted information associated with a specific entity to a remote device associated with the specific entity, where the remote device lacks access to a decrypting cryptographic key enabled to decrypt the information associated with a specific entity, upon failure of the database, sending the encrypted information associated with the specific entity from the remote device to a recovering server, and decrypting the encrypted information by the recovering server.

System and method for database recovery

A computerized system and method for symmetric encryption and decryption using two machines, the method including obtaining a message and an initialization vector on a first machine, sending the initialization vector to a second machine, where said second machine stores an encryption key for a Key Derivation Function (KDF), generating a derived key on the second machine by applying the KDF receiving as input both the encryption key and the initialization vector, sending the derived key from the second machine to the first machine, and encrypting the message using the derived key on the first machine.

System and method for data encryption using key derivation

Preventing misuse of a cryptographic key by receiving a request to carry out a cryptographic operation using a cryptographic key from a requesting entity, distributing the request to a quorum comprising multiple computerized devices, receiving a decision from the multiple computerized devices on whether or not the cryptographic operation using the cryptographic key is allowed, and carrying out the cryptographic operation using the cryptographic key according to the decision from the multiple computerized devices.

Method for preventing misuse of a cryptographic key

The present invention disclosed a method operable on a multiparty signing system for performing a multiparty signing act on a digital content. The multiparty signing system disclosed in the present invention comprises at least two multiparty signing servers configured with methods to perform the multiparty signing act of a digital content to sign. The multiparty signing system can be configured to perform the multiparty signing act by a private signing key split to at least two key shares, wherein each key share is held by each of the at least two multiparty signing servers. The multiparty signing system is also configured to communicate with at least one computerized node employed to conduct an approval process for approving the multiparty signing act. The approval process can be configured to conduct the approval process by employing a secure multiparty computation, wherein the approval process is configured to utilize secret shares held by the at least one computerized node. In such cases, the multiparty signing act is approved in case the approval process ended successfully.

Method for digital signing with multiple devices operating multiparty computation with a split key

The subject matter discloses a computerized system for securing data, comprising a first node, comprising a first memory storage configured to store a first share of a cryptographic key and a communication module, a second node, in communication with the first node, comprising a second memory storage configured to store a second share of the cryptographic key, wherein the first share and the second share of the cryptographic key are required to perform a cryptographic operation using a multi-party computation (MPC) process, wherein the second node further comprises a control unit configured to change an operation mode of the second share from enable to disable, wherein the disable operation mode prevents performing the cryptographic operation using the MPC process.

System and method for controlling usage of cryptographic keys

The subject matter discloses a method operated on a computerizing system comprising generating two secret shares of at least some of the data fields in a database, loading data fields of the database into two database copies, wherein one secret share of the two secret shares is loaded into one database copy and another secret share of the two secret shares is loaded into another database copy, receiving a request to perform a query in the database, processing said query on the database copies, wherein the database fields employed by the query process and the query results remain secret during processing, and revealing the secret query results.

Securing SQL based databases with cryptographic protocols

The subject matter discloses a method and a system for securely distributing a credential and encryption keys for physical devices. The system comprises a security server and a physical device. the physical device comprises a memory module configured to store a share of the credential, a communication module configured to exchange signals, and a processing module configured to execute calculations upon request received on a wireless manner via the communication module from the security server, the calculations are transmitted to the security server to execute a multi-party computation process. The multi-party computation process outputs two shares of the credential, a first share is stored in the physical device. The physical device does not have access to the credential.

System and method of securing devices using encryption keys

The present invention discloses a method and system for securing digital transactions provided by a person operating a third-party computerized device designed to communicate with a multiparty signing system. The multiparty signing system may comprise a signing subsystem comprising a multiparty signing server designed to receive a request for digital signing and a first subset of end-user nodes designed to sign the digital transaction. The multiparty signing system may also comprise an approving subsystem designed for approving the digital transactions. The approving subsystem may comprise a coordinator and a second subset of end-user nodes for approving the digital transactions.

Multiparty computation of a digital signature of a transaction with advanced approval system

The present invention discloses a method and system for securing digital transactions provided by a person operating a third-party computerized device designed to communicate with a multiparty signing system. The multiparty signing system may comprise a signing subsystem comprising a multiparty signing server designed to receive a request for digital signing and a first subset of end-user nodes designed to generate a group of key shares which can be utilized in MPC processes conducted by the multiparty signing server. The multiparty signing system may also comprise an approving subsystem designed for generating groups of key shares to approve the digital transactions. The approving subsystem may comprise a coordinator and a second subset of end-user nodes for generating groups of key shares. The multiparty signing server may be configured to receive from a third-party server a transaction to sign and to send a first request to the coordinator to receive a first group of key shares.

Multiparty computation for approving digital transaction by utilizing groups of key shares

The subject matter discloses a system for enforcing correctness of a derivation key, comprising multiple computerized nodes, comprising a storage module configured to store a share of a key used as an input of a function generating the derivation key, a communication module configured to exchange information between the multiple computerized nodes, and a processing module configured to receiving a request to create the derivation key, performing an MPC process between the multiple computerized nodes, said MPC process is performed multiple times, in each time the MPC process comprises receiving the key shares as input, randomly selecting a function, outputting the outputs of the selected function to the multiple computerized nodes, the multiple computerized nodes lack access to the selected function, the multiple computerized nodes perform computations on the received outputs and exchange outputs of the computations to estimate correction of the key shares inputted into the MPC process.

System and method for enforcement of correctness for key derivation

The subject matter discloses a computerized system for authenticating a person requesting access to a physical entity. The system comprises a controller configured to control access to the physical entity, said controller is connected to a biometric acquisition device configured to acquire biometric data of the person. The controller comprises a communication module configured to communicate wirelessly with an electronic device used by the person. The system also comprises a computerized server communicating with the controller or the person's electronic device, said server is configured to provide validation indication of the person using the biometric data and an MPC process performed between at least two of the controller, server and the person's device.

System and method for authenticating a person using biometric data

The subject matter discloses a computerized system, comprising a computerized device communicating with a third party server, that comprises a memory unit that stores a representation of a Boolean circuit and a processing unit for calculating a result of the Boolean circuit according to a string used as input for the Boolean circuit and calculating a first predefined function on the result of the Boolean circuit. The system also comprises a first auxiliary server communicating with the computerized device, the first auxiliary server comprises a processing unit for calculating a second predefined function on the result of the Boolean circuit received from the computerized device and a second auxiliary server communicating with the computerized device comprises a processing unit for comparing the result of the first predefined function and the result of the second predefined function.

Growing community of inventors

Talmey Yechiel, Israel

Guy Pe'er